Steam-actuated valve.



No. 677,328. Patented June 25, I901. F. L. REEDER & A. B. FREVILLE.

STEAM ACTUATED VALVE.

(Application filed Jan. 15, 1901.) 1 (No Model.) 2 Sheets-$heat l.

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Patanted June 25, l90l.

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2 Sheets-Sheet 2.

(No Model.)

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PATENT FRANK L. REEDER AND ALBERT B. FREVILLE, OF LOUISVILLE, KENTUCKY,

ASSIGNORS TO THE SAME PLACE.

NATIONAL FOUNDRY AND MACHINE COMPANY, OF

STEAM-ACTUATED VALVE.

SPECIFICATION forming part of Letters Patent No. 677,328, dated June 25,1901. Application filed January 15, 1901. Serial No. 43,310. (No model.)

To all whom it may concern.-

Beit known that we, FRANK L. REEDER and ALBERT B. FREVILLE, citizens ofthe United States, and residents of Louisville, in the county have madea certain new and useful Invention in Steam-Actuated Valves; and wedeclare the following to be a full, clear, and exact description of thesame, such as will enable others skilled in the art to which itappertains to make and use the invention, reference being had to theaccompanying drawings, and to characters of reference marked thereon,which form a part of this specification.

Figure l is a central vertical section of our pump. Fig. 2 is a sectionon the line a; as, Fig. 1. Fig. 3 is a detail fragmentary section on theline y y, Fig. 1, the levers K K being shown in side elevation.

This invention has relation to steam-pumps, the object being to providean improvement upon the steam actuated valve for which Letters Patentwere granted April 27, 1886, and numbered 340,819.

With this object in view the invention consists in the novelconstruction and combination of parts, all as hereinafter described, andpointed out in the appended claims.

Referring to the accompanying drawings, the letter A designates thesteam-cylinder of an air-compressor, and B the air-compressing cylinder,having a common piston-rod C and pistons C and 0 D is the steam-chest,and E and F the induction and eduction passages, respectively, for steamto and from the cylinder.

H is a balanced piston slide-valve reciprocating in the steam-chest, ofhollow cylindrical form throughout, the interior of which is in constantcommunication with the passage E at 6', having steam-ports at e e inalternate communication with passages f f to admit steam to thecylinder, the chamber H in the lower wall of which valve is in alternatecommunication with passages f f to exhaust steam from the cylinder. 9 isa pin engaging slot g of said valve to prevent turning thereof, andports e are provided upon both sides of such valve, so that no matterwhich steam-port h to passage h,

of Jefferson and State of Kentucky, .wardly into communication with thecylin springs h rod-valve J, having passage j,

way it is inserted in place there will be no blocking ofinduction-passage E.

In each end wall of piston-valve H is a extended down V 5 5 dricalchamber 1, extending longitudinally of the cylinder at one side of thesteam-eduction passage F, said ports it being closed to prevent theescape of steam in the vertical engine shown by valves h carried by fiatsecured to the valve-wall. Reciprocating in chamber I is a cylindricalalternately connecting passages h with passages 7' 9 leading fromeduction-passage F into chamber I. This rod-valve is reciprocated bymeans of short intermediately-pivoted levers K K, having the work-armsthereof acting against the end of the valve and the powerarms thereofextended downwardly and projecting through the end walls of the cylinderto a slight extent in the path of the moving piston when it has aboutcompleted the stroke. Passages 7t 7.: connect the cylinder with chamberI at each end thereof, in which passages said levers K K work. Therod-valve con sists of acentral portion 7' in which is passage j,reduced portions around which is a wide annular groove 3' at each sideof part and a series of narrow alternating annular grooves and ribsextending to near each end of the rod-valve to reduce the weight andfriction of said valve and act as a water-pack ing. The annular groovesserve to alternately connect eXhaust-passagesj with passages h toexhaust steam from between the end walls of the piston slide-valve andthe steam-chest. A spring-pressed pin It bears in a guideway 10 of saidrod-valve to prevent vibration of the molecules thereof, which vibrationhas been found objectionable in practice.

In operation when the piston nears the end of each stroke levers K K areactuated to bring passage j of the rod-valve into communication with theexhaust-passage f to open valves h and admit exhaust-steam between theend walls of the steam-chest and the piston-valve to actuate such valve.

In order to cushion the piston at the end of loo the stroke thereof andto aid in the reversal of the movement of the piston, we provide asteamway Z in the inner wall of the cylinder, at each end thereof, of alength a little greater than the width of packing-rings c of the piston,whereby when the piston has almost completed a stroke steam finds itsway around the piston to the opposite side thereof.

Referring to the air side of our pump, the cylinder B thereof isprovided at each end with the double valve-chambers l and 2, each indirect communication with said cylinder by short passages 3 of a lengthequal to the thickness of the cylinder-shell at such points. 4 indicatesthe valve cage or bushing, having a tapered threaded engagement witheach said chamber and provided each with a jamnut 5, having air-inletopenings 6. These bushings have intermediate perforations communicatingwith grooves in the inner walls of the valve-chambers, which groovescommunicate with the short passages aforesaid. The bushings have doublevalve-seats, for which inlet and exhaust valves 7 and 8 are provided.

The lift of the exhaust-valves is adj ustably limited by screw-plugs 9,and the lift of the inlet-valves is limited by the radial guidefiangesof the exhaust-valves.

Having thus described our invention, what we claim as new, and desire tosecure by Letters Patent, is

1. In a steam-pump, a reciprocatory rodvalve, and means in connectionwith said valve for admitting exhaust-steam between the end walls of theslide-valve and of the steam-chest just before the piston has completedits stroke, substantially as specified.

2. In a steam-pump, a rod-valve, levers engaging said valve, andextending in the path of the moving piston just before it has completedits stroke to reciprocate said valve, and means in connection with saidrod-valve for admitting exhaust-steam alternately between the oppositeend walls of the slidevalve, and of the steam-chest, substantially asspecified.

3. In a steam-pump, a reciprocatory rodvalve, an integral pistonslide-valve, cylindrical throughout its length, means for preventingrotation of said piston slide-valve, and means in connection with saidrod-valve and slide-valve for admitting exhaust-steam between the endwalls of the slide-valve, and of the steam-chest, just before the pistonhas completed its stroke, substantially as speci fied.

4. In a steam-pump, a chamber I in the cylinder having portsj", 3'communicating with the steam-eduction passage for the cylinder, andports h, h communicating with the steamchest, ports h, h, in theslide-valve in said steam-chest in alternate communication with saidports 7t, h, valves controlling said ports h, h, a rod-valve having apassage alternately connectingportsj with ports h, h to alternatelyadmit exhaust-steam between the oppleted its stroke,

posite end walls of slide-valve and steam chest, means for reciprocatingsaid rod-valve just before the piston has completed its stroke, andexhaust-ports alternately communicating with said ports, h, h,substantially as specified.

5. In a steam-pump, a reciprocatory rod valve, and means acting inconnection with said valve for admitting exhaust-steam between the endwalls of the slidevalve and of the steam-chest just before the pistonhas completed its stroke, consisting of a chamber in which saidrod-valve reciprocates, ports or passages connecting said chamber withthe steam-eduction passage of the cylinder, and with the steam-chests,ports in the slide-valve, and valves for controlling such ports, saidrod-valve having a passage in alternate communication with alternateports connecting said chamber, and steam-eduction passage, and withalternate ports connecting said chamber and steam-chest, exhaust portsor passages in alternate communication with said ports connectingchamber and steamchest, together with levers engaging the end portionsof said rod-valve and extending in the path of the moving piston,substantially as specified.

6. In a steam-pump, a reciprocatory rodvalve, and means in connectionwith said valve for admitting exhaust-steam between the end walls of theslide-valve and of the steam-chest just before the piston has completedits stroke, consisting of achamber in which said rod-valve reciprocates,ports or passages connecting said chamber with the steam-eductionpassage of the cylinder, and with the steam-chest,- the integral pistonslide-valve cylindrical throughout its length, and having ports, andvalves carried by fiat springs, for such ports, said rod-valve having apassage in alternate communication with alternate ports connecting saidchamber and steam-eduction passage, and with alternate ports connectingsaid chamber and steam-'- chest, exhaust-ports in alternate communication with said ports connecting chamber and steam-chest,together withlevers engaging the end portions of said rod-valve, and extending in thepath of the moving piston,substantially' as specified.

7. In a steam-pump, a reciprocatory rodvalve, and means in connectionwith said valve for admitting exhaust-steam between the end walls of theslide-valve and of the steam-chest just before the piston hascomtogether with a springpressed pin engaging said rod-valve to checkmolecular vibration thereof, substantially as specified.

8. In a steam-pump, means for cushioning the piston at the end of itsstroke, consisting of a groove in the inner wall of the cylinder at eachend thereof, and spanning the packing of said piston, to allow the steamto pass around the piston, substantially as specified.

9. In a steampump, a reciprocatory rodrid --valve, and means acting inconnection with said valve for admitting exhaust-steam between the endwalls of the slide-valve and the steam-chest just before the piston hascompleted its stroke, consisting of a chamber in which said rod-valvereciprocates, ports or passages connecting said chamber with thesteam-eduction passage of the cylinder, and with the steam-chest, portsin the slide-valve, and valves for controlling said ports, saidrod-valve having a passage in alternate communication with alternateports connecting said chamber and steam-ohest,said rod-valve having alsoannular grooves and exhaust ports or passages in alternate communicationthrough such grooves with said ports connecting chamber and steam-chest,together with levers engaging the end portions of said rod-valve, andextending in the path of the moving piston, substantially as specified.

10. In a steam-pump, a reciprocatory rodvalve, having alternate annulargrooves and ribs to form a water-packing and reduce friction, and meansin connection with said valve for admitting steam between the end wallsof the slide valve and of the steam-chest just before the piston hascompleted its stroke, substantially as specified.

11. In a steam-pump, a reciprocatory rodvalve, a balanced pistonslide-valve, and means in connection with said rod-valve for admittingexhaust-steam between the end walls of said slide-valve and of thesteamchest just before the piston has completed its stroke,substantially as specified.

12. In a steam-pump, a reciprocatory rodvalve, a balanced pistonslide-valve of cylindrical form, and integral throughout, and means inconnection with said rod-valve for admitting exhaust-steam between theend walls of said slide-valve and of the steamchest just before thepiston has completed its stroke, substantially as specified.

In testimony whereof we afiix our signa tures in presence of twowitnesses.

FRANK L. REEDER. ALBERT B. FREVILLE; Witnesses:

CHARLES H. FREVILLE, FRANK. M. LOSEY.

